28 January 2017 Analysis of nonlinearity mitigation using spectral inversion in superchannel transmission
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Nonlinearity mitigation (NLM) is required to extend optical reach of spectrally efficient superchannel transmission with higher order modulation format. NLM by spectral inversion (SI) has been believed to be impractical because of required link symmetry with respect to SI. We show that SI still can mitigate significant nonlinearity in non-symmetric link configurations. We also developed an analytical model to estimate NLM by SI in arbitrary link configurations and SI placement. Especially, the impact of link symmetry on inter-subcarrier and intra-subcarrier NLM by SI in superchannel transmission is evaluated by simulation and explained by the analytical model.
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Inwoong Kim, Olga Vassilieva, Paparao Palacharla, and Tadashi Ikeuchi "Analysis of nonlinearity mitigation using spectral inversion in superchannel transmission", Proc. SPIE 10129, Optical Metro Networks and Short-Haul Systems IX, 101290E (28 January 2017); doi: 10.1117/12.2252535; https://doi.org/10.1117/12.2252535

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